Electronics Forum | Mon Dec 03 20:30:58 EST 2007 | shy
Q: I thought you said that the parts that weren't wetting in reflow were the parts with epoxy. A: Yes you're correct. Q: The question I have is do they wet in wave solder, and if they do, why does it matter what happens to them in ref
Electronics Forum | Wed Dec 05 22:59:42 EST 2007 | er_pe
To be successful, and to yield quality products off any selective solder systems out there on the market today, DFX rules need to be enforced and followed. Lay-out is a one-shot process where as manufacturing of the PCBA is continuous. Obviously, muc
Electronics Forum | Fri Dec 07 08:57:24 EST 2007 | ck_the_flip
Well first of all, you can�t even go NEAR the machine unless you have no life - and you can PROVE it mathematically. The machine�s got an automatic �geek sensor�. Then, in order to turn the machine on, you have to solve a 1st order differential eq
Electronics Forum | Wed Nov 28 16:08:38 EST 2007 | jmelson
I've been using Xilinx TQFP's in the 44 and 144 lead sizes with no trouble. I don't even bake them before reflow and have never had any problem. The Xilinx parts are certainly NOT sensitive, I could not break one with my bare hands if I tried (I ha
Electronics Forum | Thu Nov 29 16:00:03 EST 2007 | jmelson
Desoldering often applies a LOT more heat and thermal stress to the part, and maybe mechanical forces while everything is hot, to get the part free of the board. So, a lot of damage might be done there, making post-mortem harder. Without the leads,
Electronics Forum | Mon Dec 03 10:22:11 EST 2007 | pms
The PCB's are supplied by the customer. No options. The BOSS say's get it done, make it work, I don't want to hear it. My BOSS is a psychotic idiot. The printer is a DEK with no options for manual fiducial over-ride. I think my idiot BOSS wrote the
Electronics Forum | Tue Dec 04 09:46:50 EST 2007 | pms
Thanks for all your suggestions. I like the BGA replacement pad option the best. Reprogramming/programing? Forget it. That's what I'm trying to avoid. I'd be there all friggin day long, with all the loser "Labor Only" accounts we have. And oh, the p
Electronics Forum | Mon Dec 03 14:53:54 EST 2007 | jmelson
Well, it mostly does. The explanation and how-to-fix fields of the error chart do contain some howlingly bad translations. But, the how to fix field said the management info needed to be cleared. Once I understood they meant the MIS statistical dat
Electronics Forum | Sat Jan 19 23:23:45 EST 2008 | bentigano
I'm not familiar with SPC Plus. I'll assume it's a "statical process control" system. We use the SPC data collected by our YesTech AOI system, together with a custom, web-based reporting system for process analysis and defect reporting. I am actually
Electronics Forum | Thu Dec 06 08:57:32 EST 2007 | davef
With this small amount of background information on the situation, comments are: * If you let adhesive cure on your stencil, you should not be using Zestron 301. A hammer and chisel is more effective. * Assuming you are not letting the adhesive cure,
